by Asim Abbas
10 November 2026 
Undeclared Overseas Income? How to Use the Worldwide Disclosure Facility (2026 Guide)
Many UK residents have savings, property or investments abroad and never realised the income was taxable here. If that sounds familiar, the Worldwide Disclosure Facility lets you put things right with HMRC on your own terms.
This guide explains how it works, step by step, in plain English.
- The WDF is HMRC’s route for disclosing unpaid UK tax linked to overseas income, gains or assets.
- You have 90 days from notifying HMRC to submit your disclosure.
- Coming forward before HMRC contacts you usually means lower penalties.
- For offshore income, HMRC can usually look back up to 12 years.
What is the Worldwide Disclosure Facility?
The Worldwide Disclosure Facility (WDF) is HMRC’s official route for disclosing unpaid UK tax linked to offshore income, gains or assets.
You tell HMRC you intend to disclose. You then have 90 days to work out and pay what you owe.
It does not offer special penalty rates. Its real value is that coming forward first usually means lower penalties than waiting for HMRC to contact you.
Who needs to use it?
Most UK residents pay UK tax on their worldwide income and gains. That is true even if the money never comes to the UK, and sometimes even if tax was paid abroad.
You may need to disclose if you have undeclared:
- Interest from a bank or savings account abroad
- Rent from a property overseas
- Foreign pensions, dividends or investment income
- Gains from selling overseas property, shares or crypto
- Income from inherited assets held abroad
Many people in this position simply did not know the rules. You are not alone, and it can be fixed.
How HMRC finds out about overseas income
HMRC no longer relies on people coming forward.
- Under the Common Reporting Standard, more than 100 countries automatically share details of accounts held by UK residents.
- Data on cryptoasset users is being collected from 1 January 2026.
- HMRC matches this data with tax returns and sends letters where things do not add up.
If you have already received one, read our guide to the HMRC letter about income or assets abroad before you reply.
How the process works, step by step
Using the Worldwide Disclosure Facility follows a clear path:
- Notify HMRC through the Digital Disclosure Service. You receive a Disclosure Reference Number (DRN).
- Gather your records, such as overseas bank statements, rental figures and sale documents.
- Calculate the liability for each year: tax, late payment interest and penalties.
- Submit the disclosure and offer, and pay using your DRN. You can ask for time to pay.
- HMRC reviews it and confirms its next steps. Most cases then close.
All of this must happen within 90 days of notifying HMRC. In exceptionally complex cases, HMRC may agree more time if you ask early.
What records will I need?
- Bank statements for each overseas account
- Rental income and expense records
- Purchase and sale documents for assets
- Proof of any tax paid abroad, as this can reduce the UK tax due
How far back does HMRC go?
The number of years depends on why the tax was missed.
| Behaviour | Usual UK time limit | Offshore income and gains |
|---|---|---|
| Took reasonable care | 4 years | Up to 12 years |
| Careless | 6 years | Up to 12 years |
| Deliberate | 20 years | 20 years |
For offshore matters, HMRC can usually go back up to 12 years even when the error was innocent. Read more in how far back HMRC can go on offshore income.
Penalties and how to reduce them
Penalties are a percentage of the extra tax. The percentage depends on:
- Whether the error was careless or deliberate
- Whether you came forward before HMRC contacted you
- Which country the income came from
- How fully you help HMRC with the disclosure
In the most serious offshore cases, penalties can reach up to 200% of the tax. A prompt, unprompted and complete disclosure keeps the penalty as low as the law allows. Late payment interest is also charged.
WDF or another route?
The Worldwide Disclosure Facility is not the only option. Choosing the right route matters.
| Route | Best for | Key point |
|---|---|---|
| Worldwide Disclosure Facility | Tax linked to overseas income or assets | 90 days to disclose |
| Let Property Campaign | UK rental income only | Similar 90-day process |
| COP9 (Contractual Disclosure Facility) | Deliberate tax fraud | Protection from criminal investigation |
| General voluntary disclosure | Other UK-only errors | Online through HMRC |
If deliberate behaviour may be involved, take advice before you notify anything.
Frequently asked questions
Is it too late if HMRC has already written to me?
Usually not. You can still disclose, although penalties may be higher if the disclosure is treated as prompted. Act quickly.
Will I be prosecuted?
Prosecution is rare where people come forward voluntarily and the error was not deliberate.
What if I already paid tax abroad?
Foreign tax credit relief usually reduces the UK tax. The income still needs reporting, but the extra tax may be small.
Can I use the WDF if I now live abroad?
Yes, if you meet HMRC’s eligibility criteria.
Can I disclose for someone who has died?
Yes. Personal representatives can use the facility to settle a deceased person’s tax affairs.
Can I pay in instalments?
You can ask HMRC for a time-to-pay arrangement when you submit your disclosure.
Next steps: put it right with confidence
Undeclared overseas income is common, and it is fixable. The earlier you act, the lower the penalties are likely to be.
Our Chartered Certified Accountants handle the whole Worldwide Disclosure Facility process, from notification to settlement, for a fixed fee agreed upfront, VAT included. If you sold property or shares abroad, we can also work out any Capital Gains Tax due.
Book a free, confidential callCall 0161 531 4179
